<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var num1 = 10;
        var num2 = 20;
        console.log(num1 > num2);
        console.log(num1 < num2);
        console.log(5 >= 3);
        console.log('abc' > 123);   //  ascii
        console.log('a' > 'b');

        console.log(3 <= 5);    // true


        console.log( 5 == 5);   //  true
        console.log('51' == 51);   // true   
        console.log('51' === 51);
        console.log(51 === 51);

        console.log(null == undefined);   //  true
        console.log(null === undefined);  


        console.log(NaN == NaN);   //  false  NaN  Not a Number 

        console.log(5 != 3);
        console.log(5 != '5');

        console.log(5 !== '5');
    </script>
</body>
</html>